Gearing.



G. C. SIE'BERT.

GEARING.

APPLICATION FILED JUNE 23, 1913.

Patented Dec.1,1914.

2 SHEETB-SHBBT l.

sTATEs PATENT OFFICE;

mammina o. emanan-or CHICAGO, ILLINOIS. y

, dname'.

To all "whom it may concern.'

-Be it known that I, GEORGE C. Smnm, a citizen of the United States, anda resident of\ the city of Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Gearing; and I do hereby declare that the following description of my said invention, taken in connectlon with the accompanying sheets of drawings, forms a full, clear, and exact specification, which will enable others skilled in theart to which it appertains to serve to illustrate make and use the same.

My invention relates generally to impro-vements in grinders, and it consists, essentially in the novel and parts and details o construction, as hereinafter first duly set forth and described and then pointed out in the claims.

In the drawings already referred togwhich i my' said invention more fully, Figure 1 is a side elevation of my improved grinder and Fig. 2 an end elevation thereof. Fig.l 3 i's-a 'section of my devicein line 0-0 of Fig. 1. Fig. 4 is a like section of thecover detached, and Fig. 5 is a similar section slightly modiied.- ig. 6 is a face View of construc'tionfshown Fig. 5 with thevarious gears in position thereon. y

Like parts are designated by 'correspondg characters or s mbols of reference in all theigure's of the di'awings. A v v Oneobject'of this invention is the production offasmall and compact mechanism capable of being quickly attached to the edge of a t'able Aor bench, which' mechanismk 1s adapted to be o erated by manual power, or otherwise, for -t e purpose of rotating emery or bufling 'wheels and the like and intended for use in households, small manufacturing establishments, or repair shops.

Another object is the construction of such a de'vice'in which the operative parts arejtotally inclosed andlfool proof onev which the .average amateur mechanic of an investigative turn of mind may 'disassemble andreassemble without -an danger of disarrangement of parts. An ,correlated to all this, it is intended to produce a device of this kind of preeminent, lasting and wearing qualities.

To better understand my invention I now refer to the drawings in which A is the body properof -my device, which may be of 'any desired external contour, though the 'shape I Speoieationof Letters Istant. y y y f appuaonmea :une 23,1913.Y serial newness.'

peculiar combination of Patented Dec. 1 1214.

shown in the' drawings is preferred. This body 1s integrally produced in the process of 'castm ingray or malleable iron and is compose ofa front wall 1, possessed of'a continuous, thin, marginal, outwardly extendin wall 2, projecting from one face thereo This wall is thickened at various points by internal bosses 3 which are tapped out for the reception of suitable screws 4 adapted to passithrough holes 4l in 'a member 5to maintain the same in position on the wall 2, thereby forming a cover forthe interior B of the body A.

Depending from the lowest point of the wall-2 is an arm 6, the lower end of which is provided with an' extension 7 which extends horizontally at-right angles in a direction away from the exterior face of Wall 1;5 the outer, free'end of said extension termmates'in an enlarged head 8 which is vertically tapped for the reception of a suitable thum screw- 9, the upper end of which screw isilittedll with 'a loosely mounted button 10. Directly above extension 7, a suitable distance therefrom, and extending outwardly from wall-1 'are a pair of parallel, horizontally disposed ngers 11 and 11", which lingers fare adapted'to contact with the upper aceof a -table or bench 12 while 10, actuated by the'thumb screw the underface thereof to securely A- and'its contained mechanism ati've position.

Cover V5- hasnear-v -points,'- positioned diametrically opposite each other, dowel pins 13 and 13. These pins are adaptedto enter yneat ttin holes provided in thelwall 2 at diametrica ly op- 9, engages -ho-ld body v posits points therein, soithaft no matter how many times cover 5 is'removed-ifrom the body A, its j exact position thereon will always bethe same lupon replacement.

Near the upper end of wall 1 isproduced an outwardly extending, cylindrical hub or boss 14, and directly opposite said hub, on a horizontalfaxis, there 1s formed a similar boss 14 extending outwardly from cover 5. Both of these hubs are axiallyvbored in alinement to each other; the first for the reception of a shaft 15 andthe last named for introduction therethrough of a'reduced portion 15a of said shaft.

Shaft 15, for the entire length of. its larger diameter, exterior of boss 14, is threaded at A16 over which is fitted a fiange m an operits highest and lowest the cover 5, axiall 17 having a hollow hub 17 extending loosely over Iboss 14 to form a dust cover in an 'ob'- vious manner. On the o posite face of said iange 17 is also forme a cylindrical: hub 17b to receive the bore of an emery, polishingor buiiing wheel 18, as the case may be.l Embracing screw thread 16 and contacting with the outer face of wheel 18 there is aA soft Washer 19, against which bears a metallic washer 20; a nut 21 on the end of screw thread 16 being employed to tightly clamp wheel 18 between flange 17 and Washer 20. That portion of shaft 15 residing Within the interior B of the body A is cut with a plurality of spur teeth producing a inion 21. At the conclusion of this pinion said shaft is reduced in diameter at 15, as hereinbefore referred to, so as to pass through the axial bore 15h of the boss 14. The outer end of shaft extension 15 is externally screw threaded to receive a nut 22 whichbears with one, face against the outer face of the boss 14, and which is maintained in a locked position on said shaft extension by a set screw 22 passing axially through said'nut and bearing against the end of said shaft extension, the whole functioning in an evident manner.

Located on the inner face of wall 1 are a plurality of bosses 23, 24,- and 25, and on the inner face of cover 5, directly opposite said bosses and in axial alinement therewith, are similarbosses 23, 24, and 25, Bosses 23 and 23 are drilled for the rece tion of a hardened and' vground stud 26,l ig. 3, in which illustration the stud is intended to be a tight fit in the hole in boss 23, while hole 23b in boss 23 is a free fit thereover. Bosses 24 and 24 are similarly drilled for a stud 27, which stud is likewise a tight t in the hole in boss 24 and a free fit in hole 24" in boss 24. Bosses 25 and 25 are also drilled in axial alinement. But on the exterior .of with boss 25, there is provided an exteriorly extendn hub 25", whose bore is a continuation of t e bore in boss25, said bore being provided for the reception of a shaft 28, which shaft is ossess'ed of an end portion 28 of reduce diameter ada ted to be a' free fit in the axial opening in boss 25 of the wall L This shaft 28 is provided exteriorly of hub 25h with means for rotating the same, be ita crank .handle 29, shown in detail in dotted lines in Fig. 2, or other means such as a direct con nected electric motor, a Water motor, or a belt wheel.

Attention is now directed vto the fact that studs 26 and 27 may be fixed in the hubs or bosses 23 and 24 of the wall 1 and loose in the openings 23b 'and 24", Fig. 4, of the bosses 23 and 24 of the cover 15 or vice versa. In. Fig. 5 I have shown these studs lightly driven into the bosses 23 and 24, in which case the ends of said studsl will be a free it in the holes in the bosses 23 and 24 of the'wall 1 of the body A. It is now understood that studs 26 and 27 and shaft 28 are `in parallelism. On study 26 is mounted a hardened steel pinion 30 which meshes into the pinion 21 (hereinbefore referred to) on one slde of its periphery and into a spur' 4gear 31' on the diametrically opposite slde.

vThis spur gear 31'isdriven over a pimon 32, which pimon is vhardened and-bored to be a free rotatable fit on stud 27 and of a length occupying theentire space between hubs 24 and 24 minus a working clearance. The axial -.openin in spur gear 31 is broached out to tig tly lt the teeth of said pinion 32, so .as to make unnecessary an other fastening between the two. On sha t 28 there is keyed, by means of key 33, a spur gear 34, which gear meshes into pinion 32. Thus 1t will be understood thata rotation of shaft 28 will be transmitted through gear 34 to pinion 32, and through this to gear 31; thence to pinion 30 on stud 26, and therefrom to pinion 21, on shaftv 15, the whole forming a compound gear train wherein one revolution ,of shaft 28 will result in a l plurality' of revolutions of shaft l5 and grinding or polishing wheel 18 in a wholly evident manner.

- I now wish toemphasize the fact that the pinion 30. freely vrevolves on stud 26, and that pinion 32 wise a free. t on ,stud 27 51, the first on the highest point of wall 2 and the latter on hub 25b of cover 5, are employed to introducelubricant to the interior B of the body A, and, as a matter of fact said interior is always partially filled with a lubricating medium..l

In practice I prefer the studs 26 and 27 to be a tight fit in bosses 23 and 24 of the cover 5, Fig. 5. In assembling thel various parts, I frst drop shaft 28 through opening 25"v in bosses 25 and 25b of cover 5, with gear 34 adjacent said boss Y 25. Then I slip pinion 32 with its gear 31 over stud 27,

after which I perform the same function- 4with pinion 30 over stud 26. These gears and pinions arenow all .in proper position and mesh on the cover 5. Then I take 'this cover and place it in position against the wall 2 of body A, the dowel pins 13 and 13* properly positionin and locating the opposite ends of the stu 26 and 27 and thereduced end 28 of shaft 28 in their proper places in hubs 23, 24 and 25.on the inner face of wall 1 of body A. Then it is a simple matter to place the'screws 4 in posiwith its gear 31 is like-- Oil cups 50 and tion and fasten the same to fixedly retain cover 5 in place. After the parts have been so assembled, shaft 15 with its integrally formed pinion 21, and reduced shaft extension 15 is passed through boss 14 of wall 1 said pinion 21 meshed with pinion 30 'in an obvious manner, and extension 15 passed of recessed projections,

through opening 15b of boss 14Il on cover 5, after which lock nut 22 may be adjusted in an easily understood manner.

While herein I have disclosed the preferr'ed mode of practising my invention I reserve the right tomake such changes as mechanical skill' shall dictate without departing from the spirit or scope of said invention.

Having thus fully described my invention, I claim as new and desire to secure to myself by Letters Patent of the United States the following:

1. A device of the character described comprising a housing having a plurality on its inner' face. and means for detachably securing said housin to a suitable support, a cover plate 01 said housing having a plurality of integral projections on its inner face, pintles rigidly secured in the integral projections of the cover plate, and extending into the recessed projections on the inner face of the housingga driven shaft rotatable in the housing, a driving shaft spaced from said driven shaft, a gear on the driving shaft and an intermediate train of gears freely rotating on the pintles, and connecting the driven shaft with the gear on driving shaft, the integral projections on the inner face of the houslng and the `inner face of the cover forming gears of said train.

2. A device of the character described, comprising a housing having a plurality of recessed projections on its inner face, and means for detachably securing said housing to a suitable support, a cover plate for said housing having a plurality of integral projections on its inner face, pintles rigidly secured in the integral projections of the cover plate, and extendin into the recessed projections on the inner ace of the housing, housing, a driving shaft spaced from said driven shaft, a gear on the driving shaft and an intermediate train of gears connecting the driven shaft with the gear on driving shaft, the gears of said train being loosely mounted on said pintles, the integral projections on the inner face of the housing and the cover plate forming means to limit the movement of the gears of said train longitudinally of the pintles.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

GEORGE C. SIEBERT.

side bearings for the In the lpresence of- WM.A O. STARK, C. S. STARK.

a driven shaft rotatable in the 

